<!DOCTYPE html>
<html lang="en">

<head>
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    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        * {
            padding: 0;
            margin: 0;
        }

        div {
            /*   font-size: 16px; */
            background-color: red;
            /*  line-height: 150%; */

            /* 24px */
            /*      line-height: 1.5; */

        }


        .a1 {
            font-size: 20px;
            line-height: 20px;
            background-color: rgb(215, 162, 162);
        }

        .a2 {
            display: inline-block;
            font-size: 14px;
            line-height: 20px;
            background-color: yellow;
        }
    </style>
</head>

<body>
    <!-- <div>
        <span>

        </span>
    </div> -->

    <!-- 幽灵空白字节 -->


    <!--   <p>
        啦啦啦啦x
    </p>


    <p>
        啊啊啊啊x
    </p> -->


    <!--   <p>啊啊啊啊啊啊 <em>啦啦啦啦啦</em>凄凄切切群群</p> -->

    <div>
        <span class="a1">
            啊啊啊x
        </span>

        <span class="a2">
            x啦啦啦啦啦
        </span>
    </div>

</body>

</html>